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在不同应力比(R)条件下研究珠光体片层距(d)对疲劳裂纹近门槛区扩展的影响,测定了材料闭合应力强度因子(K_(cl))和门槛值(ΔK_(th))以及在门槛区扩展时裂纹尖端张开位移范围(ΔCOD)。
The influence of the pearlite layer distance (d) on the expansion of the near-sill zone in the fatigue crack under different stress ratio (R) was studied. The closed stress intensity factor (K_ (cl)) and the threshold value (ΔK_ (th) As well as the crack tip open displacement range (ΔCOD) as the sill area expands.